modif des bouttons de playlist
Merge branch 'master' of github.com:Eygle/wmp
Merge branch 'master' of github.com:Eygle/wmp
added AddFolder_Click
Merge branch 'master' of github.com:Eygle/wmp

Conflicts:
	MediaPlayer/ViewModel/CurrentUsers.cs
Merge branch 'master' of github.com:Eygle/wmp